Table 3. Diagnostic-light LED codes
Diagnostic light codes
(Amber,White)
Problem description Recommended solutions
1,1 TPM detection failure
1,2 Unrecoverable SPI Flash Failure
2,1 Processor failure Replace the system board.
2,2 System board: BIOS or ROM (Read-Only
Memory) failure
Flash latest BIOS version. If problem persists, replace
the system board.
2,3 No memory or RAM (Random-Access
Memory) detected
Confirm that the memory module is installed properly.
If problem persists, replace the memory module.
2,4 Memory or RAM (Random-Access
Memory) failure
Reset and swap memory modules among the slots. If
problem persists, replace the memory module.
2,5 Invalid memory installed Reset and swap memory modules among the slots. If
problem persists, replace the memory module.
2,6 System-board or chipset error Flash latest BIOS version. If problem persists, replace
the system board.
2,7 Display failure - SBIOS message Replace display cable (EDP) if possible, otherwise
replace the display assembly (LCD).
2,8 Display failure - EC detection of power rail
failure
3,1 Coin-cell battery failure Reset the CMOS battery connection. If problem
persists, replace the RTC battery.
3,2 PCI, video card/chip failure Replace the system board.
3,3 Recovery image not found Flash latest BIOS version. If problem persists, replace
the system board.
3,4 Recovery image found but invalid Flash latest BIOS version. If problem persists, replace
the system board.
3,5 Power-rail failure EC ran into power sequencing failure. If problem
persists, replace the system board.
3,6 System BIOS Flash incomplete Flash corruption detected by SBIOS. If problem
persists, replace the system board.
3,7 Management Engine (ME) error Timeout waiting on ME to reply to HECI message. If
problem persists, replace the system board.
LED Indicators and Characteristics
Battery Charge and Status LED
Table 4. Battery Charge and Status LED Indicator
Power Source LED Behavior System Power State Battery Charge Level
AC Adapter Off S0 - S5 Fully Charged
AC Adapter Solid White S0 - S5 < Fully Charged
Battery Off S0 - S5 11-100%
Battery Solid Amber (590+/-3 nm) S0 - S5 < 10%
● S0 (ON) - System is turned on.
● S4 (Hibernate) - The system consumes the least power compared to all other sleep states. The system is almost at an OFF
state, expect for a trickle power. The context data is written to hard drive.
104
Troubleshooting
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